Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for receiving control information by a first user equipment (UE) in a wireless communication system supporting communication via a backhaul link between a first base station (BS) and a second BS, the method comprising: receiving, from the first BS, control information for cancelling an interference caused to the first UE by a downlink transmission of the second BS which is a neighboring BS of the first BS, the control information including a cell identifier associated with the second BS and information on a transmission mode for a second UE served by the second BS; and cancelling, based on the received control information, the interference caused to the first UE by the downlink transmission by the second BS, wherein the transmission mode is associated with a multi antenna transmission corresponding to a transmission scheme of a physical downlink shared channel (PDSCH).
This technical summary describes a method for mitigating interference in a wireless communication system where multiple base stations (BSs) communicate via a backhaul link. The system includes a first user equipment (UE) served by a first BS and a second UE served by a neighboring second BS. The first UE experiences interference from downlink transmissions by the second BS. To address this, the first BS provides control information to the first UE, which includes a cell identifier of the second BS and details about the transmission mode used by the second BS for the second UE. The transmission mode specifies a multi-antenna transmission scheme for the physical downlink shared channel (PDSCH). The first UE uses this control information to cancel the interference caused by the second BS's downlink transmission. The method ensures that the first UE can accurately identify the interfering signal and apply appropriate cancellation techniques based on the transmission mode, improving communication reliability in dense network environments. The backhaul link between the BSs enables the exchange of necessary information to facilitate interference cancellation.
2. The method of claim 1 , wherein the transmission mode associated with the multi antenna transmission comprises multiple input multiple output (MIMO).
This invention relates to wireless communication systems, specifically improving data transmission efficiency in multi-antenna configurations. The problem addressed is optimizing transmission modes to enhance performance in environments with multiple antennas, such as base stations or user devices. The invention describes a method where a transmission mode is selected based on channel conditions, user requirements, or network policies. A key aspect is the use of multiple input multiple output (MIMO) techniques, which leverage multiple antennas at both the transmitter and receiver to increase data throughput and reliability. The method involves evaluating factors like signal quality, interference levels, and device capabilities to determine the optimal MIMO configuration. This may include spatial multiplexing, where multiple data streams are transmitted simultaneously, or beamforming, where signals are directed toward specific users to improve signal strength. The selection process ensures efficient use of available resources while adapting to dynamic network conditions. The invention aims to enhance spectral efficiency, reduce latency, and improve overall communication quality in multi-antenna wireless systems.
3. The method of claim 1 , wherein the control information further comprises information on precoding used for the downlink transmission of the second BS.
A mobile device (first UE) receives control information from its serving base station (first BS) to cancel interference. This interference is caused by a neighboring base station (second BS) transmitting data to another mobile device (second UE). The control information sent to the first UE includes the neighboring second BS's cell identifier and details about the transmission mode it uses for its second UE, specifically how it employs multi-antenna transmission for the physical downlink shared channel (PDSCH). A key aspect is that this control information **further specifies the precoding used** by the second BS for its downlink transmissions. The first UE then uses all this received control information, including the precoding details, to actively cancel the interference, improving its signal reception. This system operates in a wireless network where base stations communicate via a backhaul link. ERROR (embedding): Error: Failed to save embedding: Could not find the 'embedding' column of 'patent_claims' in the schema cache
4. The method of claim 1 , wherein the control information further comprises information on a modulation and coding scheme (MCS) used for downlink transmission of the second BS.
5. A first user equipment (UE) for receiving control information in a wireless communication system supporting communication via a backhaul link between a first base station (BS) and a second BS, the first UE comprising: a receiver; and a controller configured to: receive, via the receiver from the first BS, control information for cancelling an interference caused to the first UE by a downlink transmission of the second BS which is a neighboring BS of the first BS, the control information including a cell identifier associated with the second BS and information on a transmission mode for a second UE served by the second BS, and cancelling, based on the received control information, the interference caused to the first UE by the downlink transmission by the second BS, wherein the transmission mode is associated with a multi antenna transmission corresponding to a transmission scheme of a physical downlink shared channel (PDSCH).
6. The first UE of claim 5 , wherein the transmission mode associated with the multi antenna transmission comprises multiple input multiple output (MIMO).
A system and method for wireless communication involves a first user equipment (UE) device configured to transmit data using a multi-antenna transmission mode, specifically employing multiple input multiple output (MIMO) technology. MIMO enhances data throughput and reliability by utilizing multiple antennas at both the transmitter and receiver to exploit spatial diversity and multiplexing. The first UE determines a transmission mode for the multi-antenna transmission, which includes MIMO, and selects a precoding matrix or beamforming technique to optimize signal quality and efficiency. The system may also involve coordination with a second UE or a base station to manage interference and resource allocation. The transmission mode selection may be based on channel conditions, network load, or UE capabilities. The first UE applies the selected transmission mode and precoding to transmit data, improving spectral efficiency and reducing errors in wireless communication. This approach addresses challenges in high-density wireless networks where interference and limited bandwidth can degrade performance. The solution leverages advanced antenna techniques to enhance data rates and reliability in dynamic environments.
7. The first UE of claim 5 , wherein the control information further comprises information on precoding used for the downlink transmission of the second BS.
This invention relates to wireless communication systems, specifically to techniques for enhancing inter-base station (BS) coordination in downlink transmissions. The problem addressed is the need for user equipment (UE) to efficiently receive and decode downlink transmissions from multiple BSs, particularly in scenarios involving coordinated multipoint (CoMP) transmission or multi-connectivity. The invention focuses on improving how a first UE receives and processes control information from a second BS, which may be part of a coordinated transmission scheme. The first UE receives control information from a first BS, which includes details about downlink transmissions from a second BS. This control information enables the first UE to properly decode the downlink transmission from the second BS, even if the second BS is not directly serving the first UE. The control information may include timing information, resource allocation, and other parameters needed for the UE to synchronize and decode the transmission. Additionally, the control information may specify the precoding scheme used by the second BS for its downlink transmission. Precoding is a technique used to optimize the transmission of multiple data streams to a UE, and knowing the precoding scheme allows the UE to accurately reconstruct the transmitted data. By providing this information to the first UE, the invention enables more efficient and reliable communication in scenarios where multiple BSs are involved in serving a single UE, such as in CoMP or multi-connectivity setups. This reduces the need for the UE to independently estimate or request additional information from the second BS, improving overall system performance.
8. The first UE of claim 5 , wherein the control information further comprises information on a modulation and coding scheme (MCS) used for downlink transmission of the second BS.
9. A method for transmitting control information by a first base station (BS) in a wireless communication system supporting communication via a backhaul link between the first BS and a second BS, the method comprising: receiving, from the second BS, information related to a downlink transmission by the second BS; generating, based on the received information, control information for cancelling an interference caused to a first user equipment (UE) by a downlink transmission of the second BS which is a neighboring BS of the first BS, the control information including a cell identifier associated with the second BS and information on a transmission mode for a second UE served by the second BS; and transmitting, to the first UE served by the first BS, the generated control information including the cell identifier associated with the second BS and the information on the transmission mode for the second UE served by the second BS, wherein the transmission mode is associated with a multi antenna transmission corresponding to a transmission scheme of a physical downlink shared channel (PDSCH).
10. The method of claim 9 , wherein the transmission mode associated with the multi antenna transmission comprises multiple input multiple output (MIMO).
A method for wireless communication systems addresses the challenge of optimizing data transmission efficiency in multi-antenna environments. The method involves selecting a transmission mode for multi-antenna communication, where the transmission mode includes multiple input multiple output (MIMO) techniques. MIMO enhances data throughput and reliability by utilizing multiple antennas at both the transmitter and receiver to exploit spatial diversity and multiplexing. The method dynamically adjusts transmission parameters, such as modulation schemes, coding rates, or antenna configurations, based on channel conditions to maximize performance. By incorporating MIMO, the system improves spectral efficiency, reduces interference, and supports higher data rates in wireless networks. The approach is particularly useful in scenarios with high user density or demanding bandwidth requirements, such as 5G and beyond networks. The method ensures robust communication by adapting to varying signal propagation conditions, thereby enhancing overall network performance and user experience.
11. The method of claim 9 , wherein the control information further comprises information on precoding used for the downlink transmission of the second BS.
12. The method of claim 9 , wherein the control information further comprises information on a modulation and coding scheme (MCS) used for downlink transmission of the second BS.
13. A first base station (BS) for transmitting control information in a wireless communication system supporting communication via a backhaul link between the first BS and a second BS, the first BS comprising: a transmitter; and a controller configured to: receive, from the second BS, information related to a downlink transmission by the second BS, generate, based on the received information, control information for cancelling an interference caused to a first user equipment (UE) by a downlink transmission of the second BS which is a neighboring BS of the first BS, the control information including a cell identifier associated with the second BS and information on a transmission mode for a second UE served by the second BS, and transmit, to the first UE served by the first BS, the generated control information including the cell identifier associated with the second BS and the information on the transmission mode for the second UE served by the second BS, wherein the transmission mode is associated with a multi antenna transmission corresponding to a transmission scheme of a physical downlink shared channel (PDSCH).
In wireless communication systems, interference from neighboring base stations (BSs) can degrade signal quality for user equipment (UEs). This invention addresses the problem by enabling a first BS to mitigate interference caused by a second, neighboring BS by transmitting control information to its served UE. The first BS receives information from the second BS about its downlink transmission, including details such as the second BS's cell identifier and the transmission mode used for its served UE. The first BS then generates control information for its own UE, incorporating the second BS's cell identifier and the transmission mode of the second UE. This control information allows the first UE to cancel interference from the second BS's downlink transmission. The transmission mode is linked to a multi-antenna transmission scheme for the physical downlink shared channel (PDSCH), ensuring the interference cancellation is tailored to the specific transmission characteristics. The first BS transmits this control information to its UE, enabling it to mitigate interference effectively. This approach leverages backhaul communication between BSs to enhance interference management in multi-cell environments.
14. The first BS of claim 13 , wherein the transmission mode associated with the multi antenna transmission comprises multiple input multiple output (MIMO).
This invention relates to wireless communication systems, specifically improving data transmission efficiency in multi-antenna configurations. The problem addressed is optimizing transmission modes to enhance performance in wireless networks, particularly when using multiple antennas. The invention involves a base station (BS) that selects a transmission mode for multi-antenna communication, where the transmission mode includes multiple input multiple output (MIMO) techniques. MIMO enhances data throughput and reliability by utilizing multiple antennas at both the transmitter and receiver to exploit spatial diversity and multiplexing. The base station dynamically adjusts the transmission mode based on channel conditions, user equipment capabilities, and network requirements to maximize efficiency. This approach ensures robust and high-speed data transmission in wireless environments, addressing challenges like interference and signal degradation. The system may also incorporate feedback mechanisms to refine transmission parameters in real-time, further improving performance. The invention is particularly useful in modern wireless networks where high data rates and reliable connectivity are critical.
15. The first BS of claim 13 , wherein the control information further comprises information on precoding used for the downlink transmission of the second BS.
16. The first BS of claim 13 , wherein the control information further comprises information on a modulation and coding scheme (MCS) used for downlink transmission of the second BS.
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February 9, 2021
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